MY HIS - Radeon HD4870 IceQ 4+ Turbo

hii its very good result giver ok must have this The Radeon HD4870 IceQ 4+ Turbo is the fastest single-core card HIS has produced to date, taking AMD/ATI's Radeon HD 4870 GPU, adding a custom cooling solution and overclocking both the core and memory clock speeds, with twice the standard memory to boot.

Just in case you have forgotten, here's a quick recap on the HD4870. The HD4870 (RV770) core is built on a 55nm process with the die measuring 260mm², but still somehow AMD managed to pack it with 956 million transistors, thanks mostly to the 800 stream processors that handle the vertex, pixel and geometry shader data and the 40 texture units. Needless to say it supports both DirectX 10.1 and multi-card CrossfireX set-ups.

The core clock runs at 750MHz while the 512MB of memory runs through a 256-bit memory interface which can support GDDR3, 4 and 5 and it's GDDR5 that gives the HD4870 its punch. The memory clock may only run at 900MHz but because of the way GDDR5 works (the memory frequency is double the data rate) the memory has an effective speed of 3.6GHz instead of just 1.8GHz if GDDR3 or 4 is used. This gives the HD4870 a massive bandwidth of 115GB/s.